Haier GE NS23AM Service Manual page 82

NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidification). Only the
latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed.
GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat
Inverter Flash
Code
Alert Inverter
Code Code
Red Green
LED LED
2
427 21
2 2
428 22
Table 27. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
Priority Actual Displayed
Condition Alert Text
Service Soon/
OD Inverter DC
Service
Peak Fault
Urgent
Service Soon/
OD Inverter High
Service
Main Input Current
Urgent
Component or System Operational State and Troubleshooting
Tip
The inverter has detected a DC peak fault condition.
• If condition (55A or higher) is detected, outdoor unit will stop
(compressor and fan) – moderate condition.
• Anti-short cycle is initiated.
• If peak current (55A or higher) occurs 10 times within an hour,
system will lockout – critical condition.
•
• If the unit is a variable capacity heat pump, this error may occur
entering or exiting a defrost cycle as the compressor restarts after
the 30 second compressor shift delay. If the unit was manufactured
prior to serial number 5817F and has frequent alert code 427, then
compare the inverter part number to the latest part number listed
in the unit repair parts. Units produced after serial number 5817F
which is listed on the unit name plate have an inverter with updated
software that includes compressor current slope logic to reduce the
potential of alert code 427 instances from occurring during defrost.
Replace the inverter with the latest inverter if necessary.
• Refer to the unit service documentation for detailed troubleshooting
procedures.
NOTE: Serial number format on unit name plate is PPYYMNNNNN
(PP = Manufacturing Plant, YY and M represents the year
and month made.
The sequence is:
• Red LED: Two Flashes
• Green LED: One Flash
NOTE: Inverter normal operations with no error code present is as
follows. Red LED is ON and Green LED is OFF.
The inverter has detected a high main input current condition.
• If condition is detected, outdoor unit will stop (compressor and fan)
– moderate condition.
• Anti-short cycle is initiated.
• If condition occurs 10 times within an hour, system will lockout –
critical condition.
•
• Refer to the unit service documentation for detailed troubleshooting
procedures.
The sequence is:
• Red LED: Two Flashes
• Green LED: Two Flashes
NOTE: Inverter normal operations with no error code present is as
follows. Red LED is ON and Green LED is OFF.
Page 82
How to Clear Alert
Code
To clear, disconnect
and reconnect power
to outdoor control.
To clear, disconnect
power to outdoor unit
and restart.
31-5000746 Rev. 0